CVE-2019-16228
HighSummary
A divide-by-zero error was discovered in py-lmdb 0.97 in the mdb_env_open2 function when mdb_env_read_header obtains a zero value for a certain size field. This issue can be triggered by supplying a crafted data.mdb file.
Risk Assessment
An attacker can cause a crash of the application using py-lmdb by providing a malicious database file, leading to a denial of service (DoS).
Recommendation
Update the py-lmdb library to a patched version or implement validation of data.mdb files before processing as a workaround.
Other vulnerabilities in py-lmdb
See all- CVE-2019-16226High
An issue was discovered in py-lmdb 0.97 where mdb_node_del does not validate a memmove in the case of an unexpected node->mn_hi, leading to an invalid write operation. This occurs when accessing a data.mdb file supplied by an attacker.
- CVE-2019-16224Critical
An issue was discovered in py-lmdb 0.97 where for certain values of md_flags, mdb_node_add does not properly set up a memcpy destination, leading to an invalid write operation. This occurs when accessing a data.mdb file supplied by an attacker.
- CVE-2019-16225Critical
An issue was discovered in py-lmdb 0.97 where mdb_page_touch does not properly set up mc->mc_pg[mc->top] for certain mp_flags values, leading to an invalid write operation. The vulnerability can be triggered by supplying a crafted data.mdb file.
- CVE-2019-16227Critical
An issue was discovered in py-lmdb 0.97 where for certain values of mn_flags, mdb_cursor_set triggers a memcpy with an invalid write operation within mdb_xcursor_init1. This occurs when accessing a data.mdb file supplied by an attacker.
Original NVD description (English source)
An issue was discovered in py-lmdb 0.97. There is a divide-by-zero error in the function mdb_env_open2 if mdb_env_read_header obtains a zero value for a certain size field. NOTE: this outcome occurs when accessing a data.mdb file supplied by an attacker.